Typewriting machine



Jan. 25, 1927. 615,694

G. G. GOING TYPEWRITING MACHINE 1 Filed April 1 1924 2 Sheets-Sheet 1 lNVENT OR [M I ATIZORNEY Jan. 25,, 1927. 1,615,694

(3. G. some TYPEWRITING MACHINE Filed April 16. 1924 j 2 Sheets-Sheet 2INVENTO ATTORNEY ill Patented Jan. 25, 1927.

UNITED STATES PATENT oFFI-CE.

GEORGE GOULD GOING, 0F MIDDLETOWN, CONNECTICUT, ASSIGNOR TO REMINGTON-NOISELESS TYPEWRITER CORPORATION, OF NEW YORK, N. Y., A CORPORATION OFNEW YORK.

. TYPEWRITING IvIACHINE.

' Application filed April 16, 1924. Serial No. 706,845.

This invention relates to typewriting machines, and more particularly tofront strike machines in which pivoted type bars are employed.

The object of this invention generally stated is to provide an improvedconstruction for type bars and their actuating connections which isfunctionally andstruc-- and in which improved means are provided forcausing the type bars to effect pressure imprints after having beenarrested by said stop, whereby the printingoperation 1s accomplishedsubstantially without noise.

Other objects of the invention will hereinafter more clearly appear.

The invention accordingly comprises the features of construction,combinations of elements, and arrangements of parts, which will beexemplified in the construction hereinafter described and particularlypointed out in the appended claims.

Fora fuller understanding of the nature and objects of the inventionreference should be had to the following detailed descrip-' tion takenin connection with the accompanying drawings in which:

Figure 1 is a fragn'ientary side elevation of one of the type actionsand some of the associated parts, the full lines representing. the partsas they appear in normal position; and

Figure 2 is a view similer to Fig. 1 but showing the type action inprinting position in full lines.

Referring now to the drawing, 10 denotes the frame of the typewritingmachine having a series of key levers 11 pivoted at 12 to the rearportion of the frame. Each key lever is adapted to actuate the sub-lever13, which is pivoted at 14 and is directly con nected to actuate theassociate type bar shown generally at 15. Each type bar 15 is pivoted inany suitable or well known manner at 16 and when in retracted positionis adapted to rest upon the padded support or rest 17. When moved fromthe retracted to the printing position shown clearly in Fig. 2,; eachtype bar at some intermediate polnt 1s adapted to bring into action themeans shown generallyat M, which finally operatesto produce pressureprinting. The

point in the printing movement of each type bar Where it first coactswith the means M is indicated in dotted lines in Fig. 1. Just after thebringing into action of the pressure printing means M. the type barswings into contact with the contact face of an ,absorbing cushion 19carried by a fixed stop 18 interposedin the paths of all of the typebars. -This stop is so proportioned and positioned that each type barunder the action of its key is brought to a substantially complete stopin advance of contact with the printing surface of the platen shown at20; thereby preventing a hammer blow or impact against the platen. Theclearance between the type bar and the platen when the Y formersubstantially attains this position of rest is in the neighborhood ofone one-, hundredth of an inch, or so. i

In order to bring the means M into action, the type bar is provided atits free end with a projection 21 which extends beyond the type head 22and is adapted to come into contact with a centrally disposedantifriction roller 23. This roller iscarried on one arm of the bellcrank lever 24, the latter being pivoted at 25 to some convenient fixedpart of the frame of the machine. The bell crank. lever 24 is soproportioned and positioned that the anti-friction roller 23 projectsinto the path of swing of the projection 21 on eaclrtype bar at a pointjust prior to the contact ot'a type bar with the cushion 19 of the stop18. The bell crank lever has itsother arm pivotally connected to therearendtthat is, the end adjacent the platen) of the thrust bar 26. Thefront. end of this thrust bar is pivotally connected at 27 with an arm28, which is pivoted at 29 and has a Weighted member 30 projectingupwardly therefrom. The arm 28, as indicated, is pivotally secured to arigidly held support on the frame of the machine. It is preferable thatthe support for this arm should be adjustable fore-and-aft of themachine since the efficient operation of this type action depends uponthe precise location of the point at which contact by the type bar 15takes place with the antifriction roll 23. To provide for thisadjustment, headed binding screws 30 have 'turn movement to normalthreaded stems which pass freely through elongated openings in thefoot-piece. of a bracket or hanger 31, to which the arm 28 is pivoted;the threaded ends of the screws engaging in tapped openings in themachine frame. By tightening the screws 30 the bracket 31 is firmly heldin its adjusted position.

The single means M co-operates with each type-bar in the system and istherefore common to them all. It-is shown in the retracted position inFig. 1. In order, however, that the parts shall always be brought backto this position after each printing operation, a contractile spring 32is shown contoected to the front arm of the bell crank lever 24 and tothe rearend of the thrust bar 26. This spring is normally under tension,so as to draw these parts together. A padded fixed stop 33, however, isprovided on the hanger 31 to prevent the pivoted arm 28 from swingingtoo far toward the front and thereby regulate the normal position of theroller 23 in the path of the projections 21 on the type bars.

'In order to aid in returning the parts of each type action to normalposition an expansion spring 35 is inserted under each key ever 11adjacent its rear end, and between said lever and a fixed part 36 of theframe of,

the machine. A fixed padded stop 37 is also provided to limit each keylever in its reosition.

it will e seen that the 38 of each type bar 15 is In the drawing, leverarm or heel provided with a slot 39 inwhich the pin 40 at the upper endof the associated sub-lever engages in order to actuate the type bar.

It will be also understood that while but one type action is shown thisis done in the interest of clearness. Such disclosure accordingly shouldbe taken as indicative of the plurality ofsuch instrumentalities-which'would be used substantially always in constructions embodying thisinvention. In the side actions the upright arms of the sublevers 13 maybe inclined inwardly to compensate for the difference in width betweenthe system of key levers and the system of type bars.

The operation of the construction described is as follows:

lVhen a key leverll is depressed from the position shown in full linesin Fig. 1 to the full line. positionshown in Fig. 2 by the operator,this movement causes the upper end of the associated sub-lever 13 tomove forw ardly, imparting. a downward pull to the heel 38 of thecompanion type bar 15. This type bar-in consequence swings through anarc toward printing position, which is shown I in full lines in Fig.2.When the type bar reaches the intermediate position shown in brokenlines in Fig. 1, the projection 21 con tacts with theanti-frictionroller 23. Considerable momentum at once passes from the swinging typebar and is transmitted to the bell crank lever 24, which in turn appliesamits the pull on to the arm 28 to swing it to-.

gether with the weighted member 30 from its reclining position towardthe platen. The type bar 15, however, still swings further andapproaches the platen while continuously applying momentum through theanti-friction roller 23 to the bell crank lever 24 until it comes intocontact with the padded stop 18. The momentum thus communicated to themember 30 causes it to con tinue its arcuate movement toward the platen,the anti-friction roller on the bell crank lever now moving rearwardlyat an accelerated rate out of contact with the projection 21 on. thetype bar. This movement continues until the rear end of the thrust baris brought into contact with the front face of the projection 21 on thetype bar 15.

The thrust bar 26 and the arm 28 comprise a toggle linkage adapted toapply force to the upper end of the type bar at a time when the type baris in contact with the arresting pad 19 and when the printing face ofthe effective type is very close to the printing surface of the platen,as pointed out above. The energy in the member 30, however, is notfinally spent until the toggle linkage is completely straightened, asshown in Fig. 2. In this straightened position, the toggle quicklyapplies a final thrust to the adjacent face of the projection 21 on thetype bar 15, pressing the type bar against the-resistance of the pad'lS)and in overcoming such resistance presses the effective type facequickly against .the surface of the platen, or the paper thereon. A stopat 41 is provided on the arm 28 to coact with the bar 26 and prevent thetoggle linkage from swinging through its straight line positioh,

shown in full lines in Fig. 1. Substantially at the same instant thatthe means at M are thus withdrawn from the type bar, the latter beginsto swing back to normal position partly under the influence of its ownweight and the reaction of the pad 19 and partly under the influence ofthe associated spring tion with the type bar for effecting pressureprinting and that astop is employed which is fixed in the path ofmovement of each type bar to prevent the type bar. from swinging underits own momentum intocontact with the printing surface of the platen.Such commonmeans is, by this inv-cntion, designed to accomplish pressureprinting and is arranged to receive m0- mentum from the type bar for abrief period at a point just a little before the instant when the typebar contacts with the stop.

At this instant, the type bar is moving'with substantially and a maximumvelocity,

' therefore imparts considerable momentum to the parts of the pressureprinting means.

The pressure printing means thus acquires suificient energy to completethe printing operation after the type vbar has come substantially to aposition of rest against the fixed stop. Using a toggle linkage as thepressure printing instrumentality insures finally a quick and powerful.application of the energy transmitted thereto in 'effecting an imprintunder the influence of stored energy.

Changes may struction without departing from the invention as it, isdefined in the accompanying clalms.

Having described my invention, what I claim as new and 'desire to secureby Let ters Patent, is:

- 1. In a typewriting machine having a platen, the combination with atype action comprising a key lever, a type bar and actuating connectionstherebetween, of a stop fixed in the. path of the type bar and arrangedsubstantially to arrest the type bar at a relatively short distance fromsaid platen, and means disconnected from but operable by the type bar toapply a printing pressure as distinguished from a blow to the type barafter it comes in contact with said stop and thereby overcome theresistance of said stop and effect a pressure imprint. Q

2. In a typewriting machine having a platen, the combination with a typeaction comprising a key lever, a type bar and actuating connectionstherebetween, of a stop arranged substantially to arrest the type bar ata relatively short distan e from said laten, and means operable by thetype bar lint independent of direct connections there. with to apply'aprinting pressure to the type bar as it comes in contact with said stop'whereby to effect printing, said stop being be made in the above con--fixed in position below and in advance of the platen to intercept thetype bar in its line of travel.

3. In a typewriting machine having a platen, the combination with a typeaction comprising a key lever, a type bar and actuating connectionstherebetween, of a fixed stop arranged substantially to arrest the typebar at a relatively short distance from said platen, and means having apart thereof normally arranged in the path of the type bar, to be struckthereby at the last portion of its printing stroke and cause such meansto apply a printing pressure to the type bar 1 as it comes in contactwith said stop whereby to effect a pressure imprint, said pressureapplying means receiving its operating energy from the momentum of thetype bar. 4. In a typewritingmachine having a platen, the combinationwith a type action comprising a key lever, a type bar and actuatingconnections therebetween, of a stop fixed in the path of the type barand arranged substantially to arrest the type bar at a relatively shortdistance from said platen and means disconnected from said type actionand stop but normally arranged in the path of the type bar-and operablethereby to apply a printing pressure to the type bar after it comes incontact with said stop whereby to effect the printing operation bypressure, said means being arranged to receive its operating energy fromthe momentum of the type bar when it coacts therewith and disposed toapply the printing pressure along lines substantially parallel to themovement ofthe type bar during the printing operation.

5.'In a typewriting machine having a platen, the combination with a typeaction comprising a key lever, a type bar'and actuating connectionstherebetween, of a fixed padded stop arranged substantially to arrestthe type bar at a relatively short distance from said platen, and meansseparate and distinct from said type action but normally arranged in thepath of the type bar and operable thereby to apply a printing pressureto the type bar after it comes in contact with said stop whereby toeffect 'a.

pressure imprint, said means being normally arranged inthe' path of saidtype bar to be struckthereby and receive its operatingenergy from themomentum of the type bar and provided with means to return it to itsnormal inac ive position after the printing.

6. In a ty pewriting machine having a platen, the combination with atype action comprising'a key lever, a type bar and actuating connectionstherebetween, of a stop. arranged substantially to arrestthe type bar ata relatively short distance from said platen, and means operable by thetype bar to apply a printing pressure to the type bar as it comes incontact with saidstop wherelip by to effect printing, said meanscomprising a thrust bar for transmitting pressure to the type bar, andthrust bar supporting means adapted to support the thrust bar out of thepath of the type bar and to move it into engagement with the type barwhen said means operates.

T. In a typewriting machine having a i platen, the combination with atype action 1 comprising a key lever, a type bar and actuating'connections therebetween, of a stop arranged substantially to arrest thetype bar at a relatively short distance from said platen, and pressureapplying means operable by the type bar to apply a printing :pressure tothe type bar as it comes in con' tact with said stop whereby to effectprintto the type bar, and thrust bar supporting means adapted to supportthe thrust bar out of the path of the type bar and to move it intoengagement with the type'barwhen said means operates, said thrust barsupporting means being provided with an energy receiving member disposedin the path of the type bar whereby said meansis set win motion upon theoperation of a type bar.

-8 In a typewriting'machine having a platen, the combination with a typeaction comprising a key lever, a type bar and'actuating connectionstherebetween, of a stop arranged substantially to arrest the type bar ata relatively short distancefrom said platen, and'means independent ofthe type action and operable by the type bar to apply a printingpressure to the typebar as it comes 1n contact with said stop whereby toeliec't printing, said pressure applying means comprising a thrust barfor transmitting pressure to the type bar, and thrust bar supportingmeans adapted to support the thrust bar out of the path ofothe type bar.and to move it into. engagement with the type bar when the pressureapplying means operates said thrust bar supporting means being providedwith an energy receiving member disposed in the path of the type .barwhereby the pressure applying means is set in motion upon the operationof a type bar,-,. and a weight member disposed in a normally inactive.position 'adapted, to acquire momentum under the action of the type barwhen the pressure applying means is set in motion, and t Co-Operate withthe thrust bar to applya printing pressure to the type bar.

' platen, the combination with a series of type 9. In a typewritingmachine having a actions each comprising a key lever, a type .bar andactuating connections therebetween,

of a stop'fixed in the path of all of said type bars and arrangedsubstantially to arrest the same at a relatively short distance.

from said platen, and a single means disng, said pressure applying meanscomprismg a thrust bar for transmitting pressureconnected from butcommon to all of the type bars and normally in the paths thereof to beactuated thereby and receive and store energy from each of said typebars as it swings toward the platen and to expend such energy byapplying pressure to said swinging type bar and cause'it to effect 21pressure imprint after it has come substantially to rest against saidstop. In a typewriting machine having plate-n, the combination with atype action comprising a key lever, a type bar and actuating connectionstherebetween, of a stop disposed in the path of said type bar andarranged, substantially to arrest the same at a relatively shortdistance from said.

platen, and a toggle linkage separate and distinct'from the type actionand pivotally attached to said machine and disposed to engage with thetype bar as it, swings toward the platen and to receive energy from saidtype type bar has come substantially to rest against said stop andthereby cause an implaten, and a toggle linkage separate and distinctfrom the type action and pivotally attached to a fixed part of saidmachine and disposed to engage with said type bar at an intermediatepoint in the movement of the latter toward the platen, said togglelinkage being arranged to absorb energy from said type bar and having a)ortion adapted to apply a thrust thereto w ien type bar has come incontact with said stop.

12. In a type'writing machine having a platen, the combination with aseries of type actions comprising a plurality of key levers and'type.bars arran ed to be individually actuated thereby, of astop disposedin-the path of swing of said type barsand ar ranged substantially toarrest them ata relatively short distance from said plat-en, and acommon toggle linkage independent -of bar to be applied thereto" whenthe .i

direct connections with. said type actions pivotally attached to a.fixed part of said machine and disposed to engage with each type bar atan intermediate point in its path of swing and arranged to. apply athrust to.

the engaged type bar when -in contact with saidstop.v

13. In; a'typewriting machine having a platen, thecombination with aseries of type actions comprising a plurality of key levers and pivotedtype bars arranged to be individually actuated thereby, of a commontoggle linkageseparate and distinct from said type actions and pivotallyattached to loo thrust to the engaged type bar an a fixed part of the machine and' disposed to'be engaged and actuated by each of said I i typebars at an intermediate point in its swing to printing positionrand aply. a

a pressure imprint therefrom.

14. In a typewrlting machine having a platen, the combination with aseries of type actions. comprising a plurality ofkey levers and typebars arranged to be individually actuated thereby, of a common togglelinkage separate and distinct from said type actions and pivotallyattached to a fixed part of said machine and disposed to engage witheachof said type bars at an intermediate point in the movement thereof toprinting position, said toggle linkage being arranged to absorb energyfrom each of said type bars and 'havinga portion adapted to apply athrust thereto subsequent to the instant of engagement.

15. In a typewriting mac in having a platen, the combination with aeries of type actions comprising a plurality of key levers and type barsarranged to be individually actuated thereby, of a common means sep-'ante and distinct from said type actions and adapted to apply a printingpressure to each of said type bars, s aid means comprising a thrust bar,a pivotal supportlng means therefor, and an antl-friction engaging meansrigidly extending from said supporting means into thepath ofswingof-each of .the engaged type said type bars whereby said anti-frictionmeans is engaged by each type bar as it swings to printing position to;actuate the thrust bar and apply a printing pressure to bar.

effect 16. In a typewriting machinehaving a v platen, the combinationwith a series of type actions comprising a plurality of key levers andtype bars having individual actuatingconnections therebetween, of asingle means operable by each of said type bars and adapted to apply aprinting pressure there to, said means comprising a thrust bar andpivotal supporting means attached to, the frame of the machine, saidsupporting means being provided with means for engaging i with each ofthe type bars as it swings to printing cposition and arranged to absorbenergy from said engaged type bar and finally to apply a'thrust thereto.

17. Ina typewriting machine having a platen, the combination withaseries of type actions comprisinga plurality of key levers and pivotedtype bars having individual actuating connections therebetween, of acoinmon type bar pressing means arranged normally in the path of eachtype bar to be actuated thereby and apply the force thus 7 to be movedout of the path of said type r bar, and said pressure mechanism havinganother part that moves up behind the type bar. andlpr'esses the typeagainst the platen after the first mentioned part has been moved out ofthe path of the type bar.

, In testimony whereof I aflix my signature.

GEORGE GOULD GOING.

